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Three boys are trying to balance on a seesaw, which consists of a fulcrum rock, acting as a pivot at the center, and a very light board L = 3.60 m long, as shown in the figure above. Two boys are already on either end. One has mass m1 = 45.2 kg, and the other mass m2 = 36.8 kg.

How far from the center should the third boy, whose mass is m3 = 24.4 kg, place himself so as to balance the seesaw?

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